Pneumatic action for piano-players.



v .I. HILLSTROM & A. HAWKINSON.

PNEUMATIC ACTION FOR PIANO PLAYERS.

APPLICATION FILED APR. 9. I915.

1,168,001, Patented Jan. 11, 1916.

3 SHEETSSHEET I.

COLUMBIA PLANOGIAPH COJIAIHINUWN. D. C.

J. HILLSTROM 61 A. HAWKINSON.

PNEUMATIC ACTlON FOR PIANO PLAYERS.

APPLICATION man APR. 9. 1915.

1,168,001. Patented Jan. 11, 1916.

3 SHEETSSHEET 2.'

COLUMElA PLANOGRAPH c0., WASHINGTON, D. c.

J. HILLSTROM & A. HAWKINSON.

, PNEUMATIC ACTION FOR PIANO PLAYERS.

APPLICATION H LED APR.9. 1915.

3 SHEETS-SHEET 3.

Patented 12111.11, 1916. v

JOHN HILLSTROM AND AMIL HAWKINSON, OF CHICAGO, ILLINOIS.

PNEUMATIC ACTION FOR PIANO-PLAYERS.

Specification of Letters Patent.

Patented Jan. 11, 1916.

Application filed. April 9, 1915. Serial No. 20,209.

To all whom it may concern: I

Be it known that we, JOHN HILLsrRoM" and AMIL HAWKINSON, citizens of Sweden, residing at Chicago, in the county of Cook and tate of Illinois, have invented certain new and useful Improvements in Pneumatic Actions for Piano-Players, of which the following is a specification.

This invention relates to improvements in pneumatic actions for piano players and its object is to provide a simplified construction capable of instantaneous operation.

With the fore oing and other objects in view the invention consists in the combination and arrangement of parts to be hereinafter fully described in the following specification, pointed out in the claims and illustrated in the accompanying drawings which form a part of said specification and in which Figure 1 is a side view, partly in section, and partly in perspective of a pneumatic action embodying the features of the invention. Fig. 2 is a similar view with certain parts in an altered position. Fig. 3 is a longitudinal sectional view through the pneumatic. v Fig. 1 is a similar view in collapsed position. Fig. 5 is a plan view of a portion of the device taken on line 55 of Fig. 1. Fig. 6 is a similar view taken on line 6-6 of Fig. 1. Fig. 7 is a perspective view of the pneumatic.

Like reference characters indicate corre sponding parts throughout the several views.

The invention is illustrated as applied to an automatic combination piano comprising the tracker 1 connected by a tube 2 with the piece 3 in which the diaphragm 1 is arranged which may be operated by suction created in the tube 2 while the non-apertured portions of the music sheet 5 pass over the face of said tracker and thus retained in closed relation. When the apertured portions of the music sheet pass over the tracker air is admitted to the tube 2 and the diaphragm 4L which is connected by pitman 6 to a gravity valve 7 drops and permits said gravity valve to drop likewise upon its hinge 8 and close the opening 9 in the pneumatic 10, which latter member is constructed for continual oscillatory movement of its Copies of this patent may be obtained for upper or nonhinged wing induced by the pumping of the pedals by the operator. The movement of the pneumatic just described takes place continuously while the diaphragm 1 is in closed position as the gravity valve is then in open position and a flow of air through the opening 9 in said pneumatic is possible. The pneumatic is hinged as at 11 to the table 12 and said pneumatic is further provided with the projection 13 in .contact with the disk 14: of the abstract 15. The lower end of the abstract normally rests upon the key 16 and it is connected in any well known manner with the striking devlces.

When the members 4 and 7 open and close, respectively, as previously mentioned the operation of the latter valve prevents access of air to the pneumatic thus estopping the oscillatory movement of the nonhinged portion thereof and causing said pneumatic to ride upward upon its hinge 11 thus raising the projection 13 and causing the abstract, through its connections, to operate the striking devices instantaneously.

What is claimed is 1. A hinged striking pneumatic comprising an oscillatory Wing, a relatively stationary wing and means connected to said oscillatory wing whereby its relative movement is obviated. V

2. A. striking pneumatic comprising an oscillatory wing, a non-oscillatory wing, a hinge for the latter wing and means connected to the first named wing whereby its relative movement is obviated.

3. A hinged striking pneumatic comprising an oscillatory wing, a relatively stationary wing and a gravity valve carried by said oscillatory wing whereby its relative movement is obviated.

In testimony that we claim the foregoing as our own we have hereto afliXed our si natures in the presence of two subscribing witnesses.

JOHN HILLSTROM. AMIL HAWKINSON.

Witnesses G. H. CARLsoN, F. A. Bocnnw.

five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

